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www.calorex.comTHE PROBLEM?Commercial and Municipal swimming pools give enjoymentand healthy exercise to millions of people but can be veryexpensive to operate.An expensive problem!There are many important factors to considerwhen planning and designing an indoorswimming pool. These include safeguardingthe building structure from dangerouscondensation, optimising the internalenvironment for the safety and comfort ofbathers and saving energy whilst minimisingrunning costs and CO2 emissions to thelowest possible levels for logical economicand environmental reasons.Maintaining a comfortable poolenvironment requires the pool water andair to be heated and held at approximately27°C and 29°C respectively. In many casesthis heating is normally carried out by heatexchangers via LPHW boilers using oil orgas as fuel.Commercial and Municipal swimming pools can bevery expensive to operateAs a result of continuous evaporation,uncomfortable warm humid air containingvast amounts of valuable heat in the formof latent energy must be removed from thepool hall in order to protect the pool buildingfrom destructive condensation and chemicaldamage whilst maintaining a safe andcomfortable leisure environment for bathers.Swimming pools continuously evaporate large volumesof moisture into the space around themExcessive energy lossOver the last 30 years or so various methodsof minimising heat losses have beenproposed. Most utilise some form offresh air handling unit (AHU) where heatexchange takes place between the warmmoist out-going air and the cooler incomingfresh air.False economy?Some manufacturers claim 100% efficiencyfor these units when fitted with a top upheat pump. Unfortunately this 100% refersto air heating only, with most of the energyrich moisture being driven out to atmosphereand the pool water regaining nothing at all.Key requirements for anIndoor pool:1 Water heatingA dangerous threatSwimming pools continuously evaporatelarge volumes of moisture into the spacearound them. Unless this moisture isremoved the humidity level will increase,creating not only an uncomfortable bathingenvironment but also leading to structuraland building fabric damage.In the days when energy was far lessexpensive than it is today, the normalmethod was to sweep out the humidityusing large quantities of heated fresh air.This is a continuous operation and energyconsumption is excessive and very costly.Heat losses include all of the pool latent andsensible energy which is not recovered andtherefore entirely wasted.2 Air heating3 Humidity control4 Air cooling5 Fresh air control8-pageFinal.indd 2 28/1/08 15:57:14
THE SOLUTION!Today’s answer to this problem is the Calorex HRD heatpumpdehumidifier - a completely automatic climate andenvironmental control unit.World leadersCalorex are the world’s leading manufacturerof swimming pool, environmental controlsystems that provide dehumidification, heatrecovery and ventilation solutions basedaround heat pump technology.A swimming pool environmental controlunit must carry out its primary task ofdehumidifying the pool hall air, be designedand constructed to withstand any poolair chemical condition and provide acontinuously modulated quantity of heatedor cooled fresh air for the comfort of users.Key points at a glance: Dehumidification with automaticallymodulating heat recovery to waterand airAutomatically modulating fresh airwith heat recovery to air and waterBuilt in LPHW, with controlthermostat and three way valve,for supplementary space heatingDynamic fresh air cooling withheat recovery to waterDouble skinned cabinetPurpose built to withstandswimming pool hall atmospheresChoice of fan pressure staticsBMS interface optionsThe Calorex solutionA Calorex HRD will provide the completeanswer to humidity control, water/airtemperature control and real time freshair requirements.By recovering the latent energy in themoisture laden air of a pool hall, yourCalorex HRD will return this energy to heatthe pool water or use it to assist with poolair heating.Furthermore, there is usually sufficientrecovered energy to provide all theoperational water heating requirements withany further surplus used for air heating.EnergyefficiencyandCO2 savingsHuge hikes in gas, electricityand water tariffs have added tens ofmillions of pounds of massive costs to thecountry’s annual community swimming bill.Consequently, local authorities and leisureoperators find themselves under morepressure than ever to demonstrate effectiveenergy efficiency.Calorex are the world’s leading manufacturer of swimming poolenvironmental control systemsCalorex systems can simultaneously carefor and preserve the building structure,reduce energy usage by up to 70% andlessen associated CO2 emissions by up to70% when compared to a conventionalfull fresh air ventilation system with crossplate heat exchanger. As the units are basedon heat pump technology, efficiencies arenormally around 300% which is well abovethe 50-60% normally offered by a crossplate heat exchanger.8-pageFinal.indd 3 28/1/08 15:57:15
Page 1: Swimming Pool Environment Control S
Page 5 and 6: HOW IT WORKS: Powerful circulation:
Page 7 and 8: SPECIFICATION: HRD Systems data she

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